最近我遇到了一个基于色调和亮度值的.NET颜色图表。什么让我感到疯狂的灰度图。例如,DarkGray实际上比Gray更轻?另外,我看不到rgb值渐变中的任何逻辑,它从0到105到128?建立一个GrayScaleBrushes类
0 : Black
105 : DimGray
128 : Gray
169 : DarkGray!
192 : Silver
211 : LightGray
220 : Gainsboro
245 : Ghostwhite
255 : White
http://sites.google.com/site/cdeveloperresources/
我要的是一个GrayScaleBrushes类的行为完全与Brushes类一样,但我自定义的配置,如:
GrayScaleBrushes.Pct05
GrayScaleBrushes.Pct10
GrayScaleBrushes.Pct15
..all the way to.Pct95
...
ie: e.FillRectangle(GrayScaleBrushes.Pct05, exampleRect);
怎么办确保刷子能正确处理?
编辑: .NET笔刷类如下所示(使用反射器反汇编)。
public sealed class Brushes
{
// Fields
private static readonly object AliceBlueKey = new object();
// Methods
private Brushes()
{
}
// Properties
public static Brush AliceBlue
{
get
{
Brush brush = (Brush) SafeNativeMethods.Gdip.ThreadData[AliceBlueKey];
if (brush == null)
{
brush = new SolidBrush(Color.AliceBlue);
SafeNativeMethods.Gdip.ThreadData[AliceBlueKey] = brush;
}
return brush;
}
}
}
SafeNativeMethods似乎对我无法访问。假设我刚刚在一个静态方法中返回了一个SolidBrush,会不会正确地处理所有东西? (以及如何测试呢?)
public sealed class GrayScaleBrushes
{
private static SolidBrush pct05 = null;
public static SolidBrush Pct05
{
get
{
if (pct05 == null)
{
int rgbVal = GetRgbValFromPct(5);
pct05 = new SolidBrush(Color.FromArgb(rgbVal, rgbVal, rgbVal));
}
return pct05;
}
}
private static int GetRgbValFromPct(int pct)
{
return 255 - (int)(((float)pct/100f) * 255f);
}
}
至于原因`深灰> Gray`,请参见维基百科:http://en.wikipedia.org/wiki/X11_color_names#Color_names_that_clash_between_X11_and_HTML.2FCSS – 2011-01-10 20:52:13